What are error handling patterns for Keychain in Swift?

Error handling is an essential part of working with the Keychain in Swift. Properly managing errors not only ensures a more robust application but also provides users with clearer feedback when something goes wrong. Here are common patterns and examples for handling errors when interacting with the Keychain in Swift.

Common Error Handling Patterns

Use Do-Catch Blocks: Wrap your Keychain operations in a do-catch block to handle potential errors.
Check HTTP Status Codes: When dealing with secure operations, ensure you check status codes or results returned from the Keychain.
Return Custom Errors: Create custom error types for more detailed error handling specific to your application's needs.

Example Code


        // Example of adding a keychain item with error handling
        import Security
        
        enum KeychainError: Error {
            case unexpectedStatus(OSStatus)
        }
        
        func addKeychainItem(service: String, account: String, data: Data) throws {
            let query: [String: Any] = [
                kSecClass as String: kSecClassGenericPassword,
                kSecAttrService as String: service,
                kSecAttrAccount as String: account,
                kSecValueData as String: data
            ]

            let status = SecItemAdd(query as CFDictionary, nil)
            if status != errSecSuccess {
                throw KeychainError.unexpectedStatus(status)
            }
        }

        // Usage
        do {
            let passwordData = "mySecurePassword".data(using: .utf8)!
            try addKeychainItem(service: "com.example.app", account: "user@example.com", data: passwordData)
        } catch let error {
            print("Error adding to Keychain: \(error)")
        }

What are error handling patterns for Keychain in Swift?

Common Error Handling Patterns

Example Code

Popular Topics

Recent Languages

What are error handling patterns for Keychain in Swift?

Common Error Handling Patterns

Example Code

Related Questions

Popular Topics

Recent Languages